Niger forces have evacuated as many as 4,000 Nigerian refugees sheltering from Boko Haram militants on an island in Lake Chad.
At least 46 soldiers, and 28 civilians, have been killed in a weekend of severe, bloody clashes with Boko Haram militants.
Seven people have been killed by Boko Haram militants following an attack on a village in Chad, while the militants were retreating from Chadian Army forces.
Militants from the Nigerian terrorist organisation Boko Haram attacked the border town of Gambaru, authorities have said.
Nigerian military forces have recaptured the northeastern city of Bama from Boko Haram militants, military officials have said.
According to Nigerian military officials, as many as 300 Boko Haram militants have been killed in a counter offensive by the Nigerian army.
Suspected Boko Haram suicide bombers have killed dozens and injured even more, after three separate attacks occurred across the country in a matter of hours.
Two towns in northeastern Nigeria have been liberated from Boko Haram control by government forces, after the African country declared a six-week war against the extremist group.
Militants from the Nigerian terrorist group Boko Haram have attacked villages in the neighbouring country of Chad, for the first time since their insurgency began five years ago.
A suicide car bombing has killed at least four people and injured a further 35 at a bus station in Potiskum, northeastern Nigeria.